MEMPHIS, TN (WMC) — Digital cameras have been installed near the crosswalk used by students at Idlewild Elementary.

If drivers speed through the Idlewild school zone, you’ll receive a nice little surprise in the mail.

A map on the City of Memphis website shows the 15 school zones and S curves with the biggest speeding problems, including Grandview Heights Middle in Frayser, Cornerstone Prep in Binghampton, Richland Elementary in East Memphis, Kirby High in Hickory Hill and Holmes Road Elementary in South Memphis.